diff options
author | Michel Lespinasse <walken@google.com> | 2020-06-09 07:33:25 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 19:39:14 +0300 |
commit | d8ed45c5dcd455fc5848d47f86883a1b872ac0d0 (patch) | |
tree | f9270b32da5f3f7be73b086c99d3dfc29a13161a /kernel/events | |
parent | 0adf65f53aae86aa86d8dccada02890545de8938 (diff) |
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
This change converts the existing mmap_sem rwsem calls to use the new mmap
locking API instead.
The change is generated using coccinelle with the following rule:
// spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir .
@@
expression mm;
@@
(
-init_rwsem
+mmap_init_lock
|
-down_write
+mmap_write_lock
|
-down_write_killable
+mmap_write_lock_killable
|
-down_write_trylock
+mmap_write_trylock
|
-up_write
+mmap_write_unlock
|
-downgrade_write
+mmap_write_downgrade
|
-down_read
+mmap_read_lock
|
-down_read_killable
+mmap_read_lock_killable
|
-down_read_trylock
+mmap_read_trylock
|
-up_read
+mmap_read_unlock
)
-(&mm->mmap_sem)
+(mm)
Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Liam Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ying Han <yinghan@google.com>
Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/events')
-rw-r--r-- | kernel/events/core.c | 4 | ||||
-rw-r--r-- | kernel/events/uprobes.c | 16 |
2 files changed, 10 insertions, 10 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 63d66bbebbd5..2861addad657 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9784,7 +9784,7 @@ static void perf_event_addr_filters_apply(struct perf_event *event) if (!mm) goto restart; - down_read(&mm->mmap_sem); + mmap_read_lock(mm); } raw_spin_lock_irqsave(&ifh->lock, flags); @@ -9810,7 +9810,7 @@ static void perf_event_addr_filters_apply(struct perf_event *event) raw_spin_unlock_irqrestore(&ifh->lock, flags); if (ifh->nr_file_filters) { - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); mmput(mm); } diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index e51ec844c87c..cd82e1ba6b9b 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1058,7 +1058,7 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new) if (err && is_register) goto free; - down_write(&mm->mmap_sem); + mmap_write_lock(mm); vma = find_vma(mm, info->vaddr); if (!vma || !valid_vma(vma, is_register) || file_inode(vma->vm_file) != uprobe->inode) @@ -1080,7 +1080,7 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new) } unlock: - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); free: mmput(mm); info = free_map_info(info); @@ -1235,7 +1235,7 @@ static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm) struct vm_area_struct *vma; int err = 0; - down_read(&mm->mmap_sem); + mmap_read_lock(mm); for (vma = mm->mmap; vma; vma = vma->vm_next) { unsigned long vaddr; loff_t offset; @@ -1252,7 +1252,7 @@ static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm) vaddr = offset_to_vaddr(vma, uprobe->offset); err |= remove_breakpoint(uprobe, mm, vaddr); } - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return err; } @@ -1439,7 +1439,7 @@ static int xol_add_vma(struct mm_struct *mm, struct xol_area *area) struct vm_area_struct *vma; int ret; - if (down_write_killable(&mm->mmap_sem)) + if (mmap_write_lock_killable(mm)) return -EINTR; if (mm->uprobes_state.xol_area) { @@ -1469,7 +1469,7 @@ static int xol_add_vma(struct mm_struct *mm, struct xol_area *area) /* pairs with get_xol_area() */ smp_store_release(&mm->uprobes_state.xol_area, area); /* ^^^ */ fail: - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return ret; } @@ -2039,7 +2039,7 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp) struct uprobe *uprobe = NULL; struct vm_area_struct *vma; - down_read(&mm->mmap_sem); + mmap_read_lock(mm); vma = find_vma(mm, bp_vaddr); if (vma && vma->vm_start <= bp_vaddr) { if (valid_vma(vma, false)) { @@ -2057,7 +2057,7 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp) if (!uprobe && test_and_clear_bit(MMF_RECALC_UPROBES, &mm->flags)) mmf_recalc_uprobes(mm); - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return uprobe; } |